Liquid-fuel burner



Dec. 8 1925. 1,565,111

J. SQMMER LIQUID -FUEL BURNER Filed July 22, 1922 d" I :242: una ir- 1N y1' DH Patented Dec. 8, 1925. p

Uni'riszn STATES JOHN SOMMER, 0F PEOBA, ILLINOIS.

LIQUID-FUEL BURNER.

Application ined July 22,1922. sei-iai no. 576,516.

To all whom t may conce/mi.' d

Be it known that I, Joi-iNSoMMnR, acitizen of the United vStavtesa resident ofi Peoria, in the county of Peoria and State o f Illinois, have invented new and useful Improvements in Liquid-Fuel Burners, of 'which the following is a specification.

-This Vinvention has reference Vto liquidn Anacewhere such a burner would be adaptable.` -f 5 f y The inventionhas for its principal object to piovide a burner for liquid fuel and to combine such aburner with al door having a," mixing chamber, ,said dooi adaptedV to cover the poit leading to the combustion chamber of the furnac The invention has for a further object Y to provide a liquid fuel burner in combina#r tion with a chainbere'd door adapted to cover the port leading to the combustion chamber of a furnace and liingedly supported so that it may be moved touncover the port, and to liquid fuel and air supplying means, the door having a swingable relation in connectionv with said air supplying means and in the provision of a flexible connection in the oil supplying ineans to permit the door to be opened and closed without danger to said fuel supplyingy means.

A further object of the invention is to provide a liquid fuel burner for furnaces including ymeans disposed exteiiorly of the furnace for regulating the liquid fuel nozzle relatively to the combined oil and air-nozzle of the burner, and in the provision of means for cleaning said liquid fuel nozzle.

That the invention may be more fully understood reference is had to the accompanying drawings forming a part of the description illustrating a preferred embodi-' ment ofthe invention, in which Fig. l is a front elevation of a liquid l,fuel

f as the saine would appear if taken on the line 2-2 Fig. l;

55 Fig 3 is a `cross-section in plan as the saine would appear if taken'on the line 9i-f3 l, the dotted lines illustrating the relation of the swinging doorto the air lining, and n 1 Fig. a is an enlarged vertical ysectional view thru a portion of the air line and as the saine would appear if taken on the line iA-i Fig. i. Like characters of reference denote correspondingparts tliruout the figures. y Y

In Figs.;1, 2 and 3, ldesignates the wall of a furnacelof either an annealing, aheat-V y treating or other furnace in connection with whieha liquid fuel burner is adapted to be,

used; said wall being'providedwitha port Yor a irefboX ,2 designed to,A havecominunication with the combustion chamber of the furnace.v Y i Embedded in the wall of the `furnace and disposed preferably in verticalposition:on either side of the port'2l are angle irons@ and to these angle irons may be vbolted orv otherwise suitably secured a .face-plate 15 provided'with an opening 5., the wall of saidv opening constitutes a Harige 6 extendingk outwardly from the body ofthe face-plate. The face-*plate is `provided withfa bearing 7. The liquid fuel burner,` as previously stated, includes in its structure a chamber door having a hinged connection with the air line of the furnace to adapt it to bev swung to position over the port 2 or away therefrom as occasion may require. Thev door is designated Sand is formed or prof vided with an air chamber 9 the inlet to which comprise abossV orenlargement cast in the door having a threaded opening l() to receive an elbow Il connectedby a coupling` l2 to a pipe section 13 inthe air line. The top and bottoni and side walls forming the chamber V9 of the dooraie'tapered or inclined as at 14, see Figs. V2 and 3, and said tapered walls merge into av flange l5 lon. the front wall, which, when the door isiin theclosed position shown in Fig. 2, abnts with the outer edge, of the' flange 6 sur-V rounding the opening-5 in the face-plate 4 and vthus embraces thev chainbeied poi-tion; of the door, which, when closed is housed. within said Vflange opeiiiiiguof the faceplate and the tapering ofthe top and bottoni and side walls ofthe door eliininatesrany pos-` sibility of the door sticking dueto expan sion and: insures a tight connection. The inner wall 16 of the door is formed nor pro-.

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.vided'with a burner nozzle 17 having an orifice ISf-the inner wall of 4which is tapered asshown at 191,fora ,purpose .tobe Minore fully explained, and when saidldoor is closed the n nozzle lits within and. is centeredA apprenti@V mately axially of thet fuel port 2 Vleading j into the furnace.

door is providedwitha threaded opening- I `mixed with the Vliquid fuel.

The` outer wall of the 2O `disposed yin axialv alignment with, the nozzle 17, andin said threaded'jopening is screwed an adjusting ,nut 21 thru which isy carried Va tube 22 on the inner yend of which there is detachably connected a tipV i mixture with the fuel as they pass through the orifice 18 in the burner nozzle 17. I prefer t construct the door with a baffled plate 26 shown in dotted lines in Fig. 1 for the purpose" of providing. a sinuous channel for the passage of the air from the time it' enters the chambered door until it is discharged into the burner nozzle to be The tube 22 is preferably connected with a T-coupling 27 and to the angular elbow of said coupling is connecteda pipe 28 in the liquid fuel line. A lock nut29 is threaded on the sleeve 22 to holdit in adjustable connection with ythe couplingV 27, and aV lock nut 30 also on theV sleeve 22 regulates the position of the sleeve in its relation to the adjusting nut 21 for securing the tube 22 and its tip 23 in their proper adjusted relation to the burner nozvzle 17. ."Carried` within Vthe tube 22 and through the coupling 27 is a cleaning rod or stem 31, the inner end of whichfis--tapered or pointed, as shown in Fig. 2, and adapted to be inserted into and withdrawnfrom the orifice 24 in the tip 23 for cleaning theortice in the "event of its becoming clogged. The outward movement of the stein or rod 31 is limited by a shoulder 32 on the rod which abuts with a wall in the coupling 27, and said rod'or stem 31 is normally held in its outward position by means ofa spring 33 encircling said rod or stein between a knob on the end ofthe stem and a bushing 13=fconnlected with the couplingY 27.

yFrom Vthe foregoing it is obvious that pres-y sure applied to the knob 34 will force the rod or stelnlinwardly for the purpose of cleaning the orifice 24 -in vthe tip 23, and when this pressure yhas been relieved the spring 33 will act to retract the rod or stem y31 and move it to its outward or normal posishown.` infFigfZ. A'Vlllienit is desired toad-V justl thetip` 23in relation `to the burner noz- 'j zleV 17, said adjustingV nut 21 may be turned so as toforce the tip 23 and the tube 22 to the desired position, the bevel-face of the tip permitting it to be brought into juxtaposition with the beveled surface 19 ofthe burneri nozzle if so desired, and removed a suitable distance therefrom. tip, the lock .nut y will be turned, as well as the adjusting nut 21, Vwhen the tube 22 and the' tip.. 23 may be retracted, the lock nut 30 then being screwed up to hold the parts in such adjusted relation.

TheV air line includes the main conduit 37 to which is coupled in any suitable manner a `pipe 38 which preferably is disposed in a vertical position in front of the furnace. The lower end of said pipe 38 is connected by suitable couplings 39 with the lower end of a vertically disposed pipe 40. This latter pipe passes up thru the bearing 7'on the face-plate 4, and also up thru an ear 41 connected to the door 8, said ear 41 serving as a hinged member, and is intended to center the door on the pipe and to oscillate thereon. To the upper end of the pipe is connected a coupling member 42 provided with a beveled end 43 affording a seat against which bears the lower end of the `pipe section 13, previously referred to. With this construction the weight 'of the door is carried on the cou pling 42 and when the door is swung the pipe 13 turns on the beveled end 43 of said coupling 4 2, the meetingsurfaces of the coupling 42 and the 'pipe 13 acting as a ground joint. Having i a threaded connection with the coupling v42l and disposed longitudinally in the pipe` 13 and around which such pipe osoillates is a short section of pipe 44 thru which the air passes to and thru the cou-l plings and 11 into the chambered door 8, the inner; pipe 44 preventing any leakage at the Vjfoint formed between the pipe 13 and the coupling 42.

As 'the door is swung the pipe section 28 in thexfuel line must swing therewith, and I therefore provide in such pipe a suitable flexible coupling 45, see Fig. 1. The pipe 28 is connected with a feeder 46 receiving its supply of liquid fuel from any suitable source, andthe feed pipe 28 preferably at a point between the flexible coupling 45 and the feeden 46 is'provided with al regulator valve 47. Y y

Byproviding a burner such as herein described!) for liquid fuel and combining such a burner with a door covering the fuel inlet port` and having means for regulating the atomization and cleaning the fuel tip exteriorlyof the furnace, I gain several To remove the llO advantages over the ordinary type of liquid fuel burner. It is always necessary with liquid fuel burners of the typeused on annealing or heat-treating furnaces and the like, to clean the oil nozzle at irregular intervals due to the clogging of the small orifice thru which the liquid fuel is ejected into the furnace either from some heavy matter in the liquid fuel itself, or due to carbonizing of the fuel from the radiated heat of the furnace. In the burner of the ordinary type it is necessary to practically dismantle and disconnect it in order to clean *this orifice. However, with my burner this is made a comparatively simple matter as has been described. Furthermore, in order to adjust the degree of atomization on an ordinary burner it is necessary to do this from the furnace side of the burner which introduces the same difficulties mentioned in connection with the cleaning of the orifice. In my burner this trouble is obviated because all adjustments can be made with the burner in position and from the exterior side of the burner. Furthermore, it is necessary at irregular intervals to be able to clean out or have access to the fuel inlet port of the combustion chamber, and any ordinary burner must be completely dismantled in order to do this, or else disconnected from the fuel and air supply systems. With my burner this is easily accomplished by merely turning a valve to shut off the oil and then swinging open the door. Furthermore, it is very difficult with the ordinary burner to so enclose it in the furnace wall as to prevent the infiltration of excess air around the burner, owing to the many difficulties which have previously been mentioned in connection with the dismantling and disconnecting of the burner. With my burner it is obvious that such excess infiltration is completely obviated. An ordinary burner cannot be set in an iron plate because the radiated heat from the combustion chamber in a very short time buckles up the plate and cracks it. Furthermore, in order to get preheated air for the burner in the ordinary type it is necessary to pass the air pipe thru either the hot walls of the furnace, or some other part of the furnace where the air will be pre-heated. lVith my type of burner both these difficulties are avoided because the circulation of air in the door keeps the door cool and at the same time in extracting the heat from the door the plates become pre-heated and so aids in the combustion.

In Figs. 1 and 2 the door 8 is shown provided'with a peep-hole 48 which may or may not be used, as desired.

What I claim is: A

1. In combination with a door provided with a burner nozzle, an air line having a vertical part the upper end of which is coni nected to the top part of the door to itself provide a combined upper pivotal support and an air conduit for the door, and means to pivetally connect the lower part of door to said vertical part of the airline.

2. In combination with a door provided with a burner nozzle, a sectional airline having one section provided with a seat and having its other section connected to the door and rotatably supported on the seat so as to vertically support the door solely from the air line, and means connected to the door and movably connected to the vertical part of the air line to pivotally sup-- port the lower part of the door` from the air line.

3. In a liquid fuel burner, in combination, a supporting face plate to cover the fuely inlet port of a furnace and having an opening Vtherein surroiuided by an outwardly projecting` flange, a door to cover the opening in the face plate and adapted to fit within said surrounded flange and provided with an air circulating chamber therein, a burner nozzle in the inner wall of said door, an air line connected with said door and arranged to conduct air to the air circulating chamber thereon, means connecting the door to the air line and 'supporting the weight of the same in a manner whereby the door has a swingableconnection with said air line, and means connected to the door for con` ducting liquid fuel to the burner nozzle.

4. In a liquid fuel burner, in combination, a supporting face plate to cover the fuel inlet port of a furnace and having an opening therein surrounded by an outwardly projecting fiange, a door 4having an air circulating chamber and tapered top and bottom and side walls adapted to cover the opening in the face plate and to fit within said surrounding flange, a burner nozzle in the inner wall of said door, a pipe supported in a vertical position on the front of the face plate, said pipe adapted to conduct air to the burner nozzle in the door, means hingedly connecting door to said pipe and for carrying` the weight of the door on the pipe, such connecting means serving as a conductor of air from the pipe to the door, and other means connected to the door for conducting liquid fuel to the burner nozzle.

In a liquid fuel burner, in combination, a supportingface plate to cover the fuel inlet port of a furnace and having an opening therein, aV chambered door adapted to cover the opening in the face plate and provided with a burner nozzle, air conducting means including a pipe disposed in a vertical position on the front of the face plate, a coupling connected to said pipe, pipe connections between said door and said coupling adapted to sustain the weight of the door and swingable on said pipe and coupling, a coupling` connected with the door for conducting` liquid fuel to the burner nozzle thereof, and a feed pipe connected with said last mentioned coupling and adapted to be connected with a source of supply for liquid fuel.

6. In an apparatus of the character described, in combination, with a furnace having a fuel inlet port a face plate attachable to the wall of the furnace and having an opening coinciding with the fuel inlet port, a door adapted to fit within the opening in the face plate and to cover the fuel inlet port, a burner nozzle on said door, a main conduit for air, pipe connections between said conduit and said door, means in said pipe connection for sustaining` the Weight of th'e door and providing a hinged connection between the door and said pipe connections, a feeder for liquid fuel, means connecting` said feeder with the door for conducting the liquid fuel to the burner nozzle of the door, and a flexible connection in said last mentioned connection whereby the same may adapt itself to the swinging movement of the door.

7 In combination with a door provided with a burner nozzle, an air line having' a lower vertical part provided with a seat and a fixed tubular part projecting above the seat, said air line also having an upper vertical part connected to the door and loosely teleseoped over said tubular part and engaged on the seat to form a pivotal support for the door, and means to pivotally connect the lower part of the door to the air line.

In witness whereof I have hereunto afiixed my hand this 20th day of July, 1922.

JOHN SOMMER. 

